Perhaps you should try some spelling variations:
communication network » communication networks, communications network, communications networks
clean development » human development, urban development
has information » phase information, laws information, dis information
technology has » technology hard, technology have, technology how
network clean » network cloud, network area, network club
china africa » cpia africa, china asia
ice risk » ice rink, price risk, fire risk

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: technology has information _ ice risk communication network clean development china africa.~.
• Adding a wildcard symbol may retrieve word variants: technology has information _ ice risk communication network clean development china africa.*.